<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <form id="formElem">
        <input type="text" name="firstName" value="John">
        Picture: <input type="file" name="picture" accept="image/*">
        <input type="submit">
      </form>
      
      <script>
        formElem.onsubmit = async (e) => {
          e.preventDefault();
      
            console.log('11');
            console.log(new FormData(formElem));
         
        };
      </script>
</body>
</html>